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An authUrl is required -- it points to the page where the user will be able to sign in.'\n );\n }\n\n // Prevent multiple sessions from running at the same time, WebBrowser doesn't\n // support it this makes the behavior predictable.\n if (_authLock) {\n if (__DEV__) {\n console.warn(\n 'Attempted to call AuthSession.startAsync multiple times while already active. Only one AuthSession can be active at any given time.'\n );\n }\n\n return { type: 'locked' };\n }\n\n // About to start session, set lock\n _authLock = true;\n\n let result;\n try {\n result = await _openWebBrowserAsync(startUrl, returnUrl);\n } finally {\n // WebBrowser session complete, unset lock\n _authLock = false;\n }\n\n // Handle failures\n if (!result) {\n throw new Error('Unexpected missing AuthSession result');\n }\n if (!result.url) {\n if (result.type) {\n return result;\n } else {\n throw new Error('Unexpected AuthSession result with missing type');\n }\n }\n\n let { params, errorCode } = parseUrl(result.url);\n\n return {\n type: errorCode ? 'error' : 'success',\n params,\n errorCode,\n url: result.url,\n };\n}\n\nfunction dismiss() {\n WebBrowser.dismissAuthSession();\n}\n\nasync function _openWebBrowserAsync(startUrl, returnUrl) {\n // $FlowIssue: Flow thinks the awaited result can be a promise\n let result = await WebBrowser.openAuthSessionAsync(startUrl, returnUrl);\n if (result.type === 'cancel' || result.type === 'dismiss') {\n return { type: result.type };\n }\n\n return result;\n}\n\nfunction getStartUrl(authUrl: string, returnUrl: string): string {\n let queryString = qs.stringify({\n authUrl,\n returnUrl,\n });\n\n return `${getRedirectUrl()}/start?${queryString}`;\n}\n\nfunction getRedirectUrl(): string {\n const redirectUrl = `${BASE_URL}/${Constants.manifest.id}`;\n if (__DEV__) {\n _warnIfAnonymous(Constants.manifest.id, redirectUrl);\n }\n return redirectUrl;\n}\n\nfunction getDefaultReturnUrl(): string {\n return Linking.makeUrl('expo-auth-session');\n}\n\nfunction parseUrl(url: string): { errorCode: string | null, params: Object } {\n let parts = url.split('#');\n let hash = parts[1];\n let partsWithoutHash = parts[0].split('?');\n let queryString = partsWithoutHash[partsWithoutHash.length - 1];\n\n // Get query string (?hello=world)\n let parsedSearch = qs.parse(queryString);\n\n // Pull errorCode off of params\n let { errorCode } = parsedSearch;\n delete parsedSearch.errorCode;\n\n // Get hash (#abc=example)\n let parsedHash = {};\n if (parts[1]) {\n parsedHash = qs.parse(hash);\n }\n\n // Merge search and hash\n let params = {\n ...parsedSearch,\n ...parsedHash,\n };\n\n return {\n errorCode,\n params,\n };\n}\n\nfunction _warnIfAnonymous(id, url): void {\n if (id.startsWith('@anonymous/')) {\n console.warn(\n `You are not currently signed in to Expo on your development machine. As a result, the redirect URL for AuthSession will be \"${url}\". If you are using an OAuth provider that requires whitelisting redirect URLs, we recommend that you do not whitelist this URL -- instead, you should sign in to Expo to acquired a unique redirect URL. Additionally, if you do decide to publish this app using Expo, you will need to register an account to do it.`\n );\n }\n}\n\nexport default {\n dismiss,\n getRedirectUrl,\n getStartUrl,\n getDefaultReturnUrl,\n get getRedirectUri() {\n console.warn(\n 'Use AuthSession.getRedirectUrl rather than AuthSession.getRedirectUri (Url instead of Uri)'\n );\n return getRedirectUrl;\n },\n startAsync,\n};\n"]} |